Product Features
  • Single Channel
  • Microphone Preamp
  • Instrument DI
  • Line Input
  • Opto-Compressor

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The VT-737SP from Avalon is a single-channel, vacuum tube Class-A processor that combines a tube microphone preamp, instrument DI, opto-compressor, and a 4-band parametric AEQ.

The high-performance channel strip provides incredible warmth, depth, and character to digital recordings, and is a perfect front-end for digital audio workstations and broadcast studios.

Key Features

  • Vacuum tube triode signal path
  • High-performance microphone input transformer with +48V phantom power selection
  • Instrument DI high source input with front panel connector
  • High-gain switch boosts the overall gain of the preamplifier
  • Full dynamic control from soft compression to hard- knee limiting can be achieved with threshold, ratio-compression, attack and release controls
  • Special spectral control including de-ess is available with the dual sweep mid AEQ to side-chain switch
  • All discrete Class-A equaliser switchable between Pre/Post compressor
  • High- and low-frequency bands provide the smooth characteristics of an all passive design
  • Dual mid-bands include variable frequency and switched Q-width selection
  • Range of the mid-bands is extended into the high- and low-bands by the use of x10 frequency multipliers
  • Output level control provides a variable control of the overall signal path
  • Large VU metre for output level and compressor gain reduction monitoring
  • Switchable power supply
Number of ChannelsSingle
Inputs1 x XLR Microphone (rear)
1 x XLR Balanced Line (rear)
1 x 1/4" TS Phone Instrument (front)
Outputs1 x XLR
Frequency Response10Hz to 200kHz, -3dB line in to line out
NoiseEIN: -116dB, 22Hz to 22kHz unweighted
Gain RangeMic Pre: 0db to 58db
Instrument: 0dB to 30 dB
Line: -27dB to 28 dB
Maximum Output+30dB
Input ImpedanceNot specified by manufacturer
Phantom Power+48V
Threshold Range-30dB to +20dB
Ratio1:1 to 20:1
Attack Time2mSec to 200mSec
Release Time100mSec to 5Sec
SlopeNot specified by manufacturer
SidechainInternal with AEQ
Filter TypeDiscrete Class A, variable active and switched passive design
Frequency BandsTreble: Switched, 10kHz, 15kHz, 20kHz, 32kHz
High-Mid: Variable 200Hz to 2.8kHz or 2kHz to 28kHz (10x switch)
Low-Mid: Variable 30Hz to 450Hz or 300Hz to 4k5Hz (10x switch)
Bass: Switched, 15Hz, 30Hz, 60Hz, 150Hz
BandwidthTreble: Shelf
High-Mid: Hi-Lo Q
Low-Mid: Hi-Lo Q
Bass: Shelf
Range (Boost/Cut)Treble: +/- 20dB
High-Mid: +/- 16dB
Low-Mid: +/- 16dB
Bass: +/- 24dB range
SpecialitiesSealed silver relays for signal routing
Avalon Design VT-737SP - Channel Strip
Avalon Design
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